Leonardo di ser Piero da Vinci (April 15, 1452 – May 2, 1519) was an Italian polymath; a scientist, mathematician, engineer, inventor, anatomist, painter, sculptor, architect, botanist, musician and writer.

— Wikipedia

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* Let no man who is not a Mathematician read the elements of my work.

— The Notebooks of Leonardo da Vinci

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2008.04.24 Thursday